If you would like to block a Live TV category such as the adult channels, simply got into the settings in your Live TV app or IPTV Smarters and click the gear in the top right corner
Next click Parental Controls
Now setup your Parental Password
Select the lock on the categories you would like to password protect.
Now the categories you selected wont show up in the app unless you return to settings, click parental control again and enter the password you just setup.
If you forget your password, we cannot help you. In that event you will need to uninstall the app, then reinstall it to clear the parental password.